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Investments (Tables) | 12 Months Ended
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Dec. 31, 2018
Investments [Abstract] |
Summary of the change in noncontrolling interest |
Year ended December 31 |  | 2017 |  | 2016
Noncontrolling interest at beginning of period |  | $ | 13,762 |  | $ | 13,310
Net loss |  |  | (130) |  |  | (1,887)
Foreign currency translation |  |  | 826 |  |  | 2,339
Comprehensive income |  |  | 696 |  |  | 452
Acquisition of noncontrolling interest |  |  | (14,458) |  |  | -
Noncontrolling interest at end of period |  | $ | - |  | $ | 13,762

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